<span class="mat-button-wrapper"><ng-content></ng-content></span>
<div md-ripple *ngIf="!_isRippleDisabled()" class="mat-button-ripple"
     [class.mat-button-ripple-round]="_isRoundButton || _isIconButton"
     [mdRippleCentered]="_isIconButton"
     [mdRippleTrigger]="_getHostElement()"></div>
<!-- the touchstart handler prevents the overlay from capturing the initial tap on touch devices -->
<div class="mat-button-focus-overlay" (touchstart)="$event.preventDefault()"></div>
